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Pressure behaviour of the birefringence
in Sn2P2(S1-xSex)6
crystals in the vicinity of the Lipshitz point
Guranich P.P., Kabal R.V., Slivka A.G., Gerzanich
E.I.
Uzhhorod National University, Faculty of Physics, 32 Voloshyn
St., Uzhhorod, 88000
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The temperature dependences of the birefringence of Sn2P2(S1-xSex)6
ferroelectric crystals with x=0; 0.1 and 0.2 at high hydrostatic pressures
(to 0.4 GPa) have been investigated. On the base of the analysis of the
birefringence behaviour in the region of the phase transition the b
critical exponent of the order parameter and the a
thermal capacity have been determined. The pressure dependences for investigation
of crystals in the vicinity of the Lifshitz point have been built.
Keywords: birefringence, ferroelectrics, phase transitions, hydrostatic
pressure
doi 10.3116/16091833/2/4/179/2001 |
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